You have an old bolt action rifle with the markings fat 42 and a serial of al9322 can you tell you what it is?
Your rifle is an Italian military rifle known as a Carcano. It
was manufactured by Fabricca Armi Terni, the Italian military
arsenal, in 1942. There are several versions, yours is probably the
"fucile" or long rifle version. It should be chambered to fire the
6.5x52 mm (or "6.5 Carcano" or "6.5 Italian") round, but some fired
the 7.35mm Italian round, or the 7.9 mm (8mm) German Mauser round.
You can find more information at:
http://personal.stevens.edu/~gliberat/carcano/